The weirdest Christmas traditions

In some rural areas of Wales, a villager is selected each Christmas to
perform the ritual of Mari Lwyd. They must then parade around the
streets with a mare's skull fastened to the end of a wooden pole, while
villagers sing traditional songs. White sheets are used to conceal the pole,
and the person carrying it. Sometimes the horse's jaw is spring-loaded, so
that it can be used to snap at passers-by.